A wingnut or wing nut is a type of nut with two large metal "wings", one on each side, so it can be easily tightened and loosened by hand without tools.

Wingnut
Wing nut
Wing nut
Wrench drive wingnut
Study on Hubei Wingnut (Malus hepehensis) leaf drink and it's stability
Geographic variations of seedlings growth and biomass in Chinese wingnut (Pterocarya stenoptera) provenance
Comparative tolerance of walnut species, walnut hybrids, and wingnut to the root-lesion nematode, Pratylenchus vulnus.
Growth dynamics of Chinese wingnut (Pterocarya stenoptera) seedlings and its effects on soil chemical properties under simulated wat...
Wingnut (Juglandaceae) as a new generic host for Pityophthorus juglandis (Coleoptera: Curculionidae) and the thousand cankers diseas...
The Variation in Growth Increment and Wood Characteristics of Chinese Wingnut (Pterocarya stenoptera) under Different Environment
Volatile fraction composition and biological activities of the leaves, bark and fruits of Caucasian wingnut from Iran
Effects of submergence on photosynthesis and growth of Pterocarya stenoptera (Chinese wingnut) seedlings in the recently-created Th...
Variations of activities for protecting enzymes and superoxide of lipid membrane in Chinese Wingnut tree seedlings(Pterocarya stenop...